Thanks for the response. Most of local places only have the code readers, and I have the codes. I was looking for a tool which could perform an evap diagnostic test & give data back. Those are much harder to find,

What are the codes you are getting? (And which version of 4Runner), you really want a smoke machine to test the evap system to find either a leak etc. A scanner that can do evap test is only going to pin point if it's a(n) evap component not opening or closing properly not show you where a leak could be (used to have a Snap-On Solus Ultra)